Hello Friends,
I have spend about 3 hours with support where I am hosting my sites, I have learned an interesting thing on the side that I thought I would add to this thread.
Although not the problem with being unable to save page builder pages, you can run into a similar issue if your host is running ModSecurity on their servers. Rarely, but still possible, your IP may be false flagged. If perchance you cannot update your site, or successfully upload a file that will update a plugin or component, this is something to consider checking. If is is shared hosting and not VPS, you will likely have to contact their support and ask them to whitelist the modsecurity rule in relation to your package. They wont whitelist your IP if on shared hosting.
Something I have learned from past experiences which would also cause some issues is when moving or recreating a joomla site, depending on how you upload and extract your files (via ssh) you may have ownership/group issues. If you have root access it is easy to correct this via chown.
Anyway, after trying a bunch of things, we were not able to resolve "the save problem" via my hosting platform support. I created this thread here at the joomshaper forum hoping someone would be familiar with this issue. Prior to creating it I did find and read similar issues for some people when editing on the frontend, but mine were coming from the backend.
Long story short, here is what has helped me:
1 System > Global Check in, then clear cache, and then clear expired cache regardless if there is anything visible.
2 Extensions > Manage > Update Sites > I chose to Rebuild All
3 Back To System > Global Check in, clear the new helixU file, and reclear all expired cache.
4 Over to sp page builder > pages > open and test any page. Successfully able to save.
Please note, just simply clearing cache in joomla > system doesnt seem to work and can through you off. For me it took all the above steps in this sequence. I feel somewhat confident to share this result as I have successfully followed these same steps on my other sites, and have had consistent positive results.
The big question is WHY this happens ONLY to sp page builder pages and not joomla articles, modules etc. That i am certainly unclear on.
I'm keeping my fingers crossed, but so far so good.